Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e9b3fbaae8f7e4d…

MALICIOUS

PDF

80.1 KB Created: 2021-05-08 18:27:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7249e9b9fd0e7f106c0dcf73a970865 SHA-1: d829c49559bbb4e9d359259e9fa515cc664498b0 SHA-256: 6e9b3fbaae8f7e4d8087131f2cbae0b671b9c7b6acd89dde6923bbd548959170
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, characteristic of a link farm designed to direct users to potentially malicious websites. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution. No scripts were extracted, but the PDF structure itself is the attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://botokaw.ru/strik?utm_term=2007+honda+vt1100c2+shadow+sabre+specs
    • https://static.s123-cdn-static.com/uploads/4421199/normal_5ff0caaa3694c.pdf
    • http://womizepivilora.sportsontheweb.net/49992213703.pdf
    • https://static.s123-cdn-static.com/uploads/4443802/normal_5fe5e25020e2c.pdf
    • https://static.s123-cdn-static.com/uploads/4408866/normal_5fe3370f2a0e5.pdf
    • https://static.s123-cdn-static.com/uploads/4374376/normal_5fef18d1b6491.pdf
    • https://static.s123-cdn-static.com/uploads/4407571/normal_5ff28f91cb0d5.pdf
    • https://cdn.sqhk.co/vagofedewat/aLVXjeC/perfect_barber_shop_hair_salon_games_2.pdf
    • https://cdn.sqhk.co/jizapamilizo/Yjg2zia/dipirobifuzo.pdf
    • https://cdn-cms.f-static.net/uploads/4392667/normal_603b4167719a2.pdf
    • https://cdn.sqhk.co/fusozuwalas/ji3hbif/dictionary_search_partial_word.pdf
    • https://cdn-cms.f-static.net/uploads/4484834/normal_6056eb2263a83.pdf
    • https://cdn.sqhk.co/lalivaga/hfhgpVG/tusoveviba.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://03df74f7-894d-4c84-999e-da2b33eb06f5.filesusr.com/ugd/4c7733_2dde9041a3f4450b9fe77779427d4026.pdf?index=true
    • http://zitasixan.atwebpages.com/68006754274.pdf
    • https://11627308-8c8f-4f08-99ed-0ad85160907d.filesusr.com/ugd/682d1c_2f1b9f6060ea40599bdfacc8d360b8df.pdf?index=true
    • https://be8414c4-f2d5-40c6-b8a8-1a5561a1dac7.filesusr.com/ugd/a452ea_e79db65ebf124403986c1ae6fdcbb365.pdf?index=true
    • http://gixarewujedel.atwebpages.com/86587768868.pdf
    • https://5fb42ee6-a9be-400a-98f2-f9d4b9f720c8.filesusr.com/ugd/1813b3_baa155cde4dd403289025a26a8399323.pdf?index=true
    • https://5e20aa6b-77ef-4f11-9344-5454fb7c649c.filesusr.com/ugd/fb3aa9_43a1689b26d747eb8ceb903a0179e5b6.pdf?index=true
    • https://87b84290-c0b3-4c73-97a1-3d59c64c3f69.filesusr.com/ugd/c638b7_e3658ee9b86549b7b32f27ba7600157d.pdf?index=true
    • http://subogerilazelo.atwebpages.com/nasiv.pdf
    • https://a12a05ab-6462-4855-b086-b0a2a961d6d8.filesusr.com/ugd/2c76f4_d27baacaa8464940aa251b88cf8283c3.pdf?index=true
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea99.bin
11067f702a1e91b86f70514b77ef3fb46e62d473b6073696a5d220472cd744a1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA99 5472 bytes
font_01_sfnt_off0000fd2c.bin
fe2c9b2acc28ddadc7d1571c7d74864f523d92376dc001900b0079d44f5a6cb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFD2C 11496 bytes
font_02_sfnt_off000124bd.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124BD 4324 bytes

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